add zoom for orthographic camera

[stuikomma]

Works great so far. Only I'm missing proper support for cameras other than PerspectiveCamera.
E.g. zoom does not work with an OthographicCamera.

[mattdesl]

This seems like a limitation of ThreeJS' OrbitControls?

This module is mainly meant to mirror the ThreeJS examples. So the best course of action is to submit a PR to ThreeJS repo fixing the bug, and then let me know here and I'll bring in the new code.

[stuikomma]

Sadly this is not at the top of our agenda (although definitely nice to have 😃). We'll see if we have time to add this and make the pull request.

[versipellis]

Did this ever go anywhere?

[stuikomma]

I don't quite recall the issues, but actually there is code related to zooming with an OrthographicCamera
https://github.com/mattdesl/three-orbit-controls/blob/master/index.js#L35 and https://github.com/mattdesl/three-orbit-controls/blob/master/index.js#L372

[versipellis]

Thank you!